JP2000023136A - Data selection device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a conventional sorting process using a microcomputer or the like, the processing capability of a section alone is insufficient, so that it was not possible to sufficiently cope with an error in a transmission path. SOLUTION: In addition to performing data separation and selection processing by hardware, addition of a parameter for performing detailed separation and selection, combination of data start information, remaining data value, and continuity error information, Combination of the value of the number of remaining data and the end position of the separated data, the combination of the scramble information and the parameter, the combination of the value of the number of remaining data and the start position information, and the calculation result for the data error detection information More effective data is selected by data selection means based on a combination of the parameter and the parameter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data selection apparatus, and more particularly to an apparatus for selecting only data to be received from data received from a broadcast or digital data output from a recording device.

[0002]

2. Description of the Related Art In recent years, video data, audio data, and other data are often transmitted and stored by digital data. In such a case, it is general that the data is divided, configured into data such as a packet having a data structure composed of several fields, transmitted, and stored. Further, after a plurality of data are configured in a packet, one transmission,
Multiplexed and stored on a storage medium. As a data structure and a multiplexing standard in such a case, there is an MPEG system standard. In many cases, data transmission and storage are performed in a method conforming to the packet data structure of this standard. I have.

In such a system in which packet data is multiplexed, it is necessary for a device that receives data to select data to be received from the multiplexed packet data. In addition to audio data as audio and video data as video, an adaptation field (hereinafter abbreviated as AF), PSI (program specific information), and S
Various information associated with the program, such as I (service information), must be selected. Audio data and video data are configured in a data format called a PES packet, and PSI and SI are configured in a data format called a section. The AF data also has a unique data format.

As an example of the prior art, a description will be given of a data selection method used for a receiver such as a digital broadcast using a data multiplexing method conforming to the MPEG system standard. First, the entire packet data in transmission and storage is called a transport stream (hereinafter abbreviated as TS), and is data in which a plurality of 188-byte transport stream packets (hereinafter abbreviated as TSP) are continuous. . Therefore, data of about 188 bytes or more is divided into a plurality of TSPs and stored. The TSP itself is divided into several fields. The first four bytes are called a header, followed by a variable-length AF, and the rest are called a payload (hereinafter abbreviated as PL), and store data such as audio, video, PSI, and SI. AF or PL depending on the value of the header
May not exist.

[0005] The header is further composed of several fields. There is a field called a packet ID (hereinafter abbreviated as PID), which corresponds to a “data identifier” in the present invention. Further, there is a field called a payload unit start indicator (hereinafter abbreviated as PUSI), which corresponds to “data start information” in the present invention. Further, there is a field called a continuity counter (hereinafter abbreviated as CC), which corresponds to “data order information” in the present invention. Further, there is a field called transport scrambling control (hereinafter abbreviated as TSC), which corresponds to "scramble information" in the present invention. Further, there is a field called adaptation field control (hereinafter abbreviated as AFC), which indicates the presence or absence of AF and the presence or absence of PL.

[0006] The AF is further composed of several fields. Here, the description is limited to the existence of the data length field, and the PE stored in the PL is described.
The configuration of S packets and sections will be described.

[0007] The PES packet is further composed of several fields. Stream ID (hereinafter SID)
), Which is used to select data more finely. There is also a data length field indicating the number of bytes of data.

[0008] The section is further composed of several fields. There is a field called a table ID (hereinafter abbreviated as TID), which is used to select data more finely. Further, there is a field called a section syntax indicator (hereinafter abbreviated as SSI), which corresponds to "data format information" in the present invention. Further, there is a field called CRC, which corresponds to “data error detection information” in the present invention. There is also a data length field indicating the number of bytes of data.

[0009] For the above data sorting process,
In the conventional data selection device, program processing is performed by a microcomputer or the like. P from input packet data
ID, SID, and TID are extracted, and it is determined whether or not the data is to be selected.

[0010]

However, the conventional sorting method using a microcomputer or the like has the following speed problems. For example, when selecting a section, the following performance is roughly required. It is assumed that the microcomputer is capable of performing a 32-bit operation and is capable of comparing 4-byte data and parameters at a time. In addition, it is assumed that four clocks are required to compare the 4-byte data with the parameter, for reading the parameter and storing the comparison result. Considering the processing speed of the microcomputer as 40M instruction / second and considering the transmission speed of digital broadcasting, TS
It is necessary to perform processing at about 1000 clocks per P.

Assuming that 32 types of sections are taken out and the number of bytes to be compared is 8 bytes, the number of clocks required to select one section is 4 clocks × 8 ÷ 4 × 32 = 256 clocks. . Therefore, only 1000/256 = 4 sections can be processed per TSP. In an actual digital broadcast, 10 sections may be included for each TSP, and it is considered that the processing capability of a conventional microcomputer or the like is insufficient even by processing sections. Furthermore, if a more complicated error is to be processed, the processing capacity is further reduced, so that sufficient error countermeasures cannot be taken.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. In addition to executing data selection processing on small-scale hardware, the present invention has also been made to cope with various errors. Pre-processing with hardware minimizes data discards due to errors and the occurrence of other errors that are induced, and also allows for flexible expansion of data formats, reducing the processing load on the microcomputer. It is an object of the present invention to provide a data selection device that can perform the data selection.

[0013]

According to a first aspect of the present invention, there is provided a data selecting apparatus for specifying a data to be selected.
Parameter storage means for storing a parameter, a second parameter for specifying a field to be selected, a fifth parameter for specifying a payload to be selected, an output destination of data, and the like; A data input means for sequentially inputting packet data including data delimited by each step, a data identifier, and data start information indicating that the beginning of the data exists in the delimited range; First selecting means for separating and selecting packet data based on the data identifier, and data separated and selected by the first selecting means, based on the second parameter and the data start information,
Further, a second selecting means for separating and selecting the plurality of fields and outputting the additional information and outputting the additional information, the data separated and selected by the second selecting means, based on the fifth parameter and the additional information, And third selecting means for separating and selecting and outputting.

According to a second aspect of the present invention, there is provided the data selecting apparatus according to the first aspect, wherein
The selecting means is configured to collectively output a specific field among the data separated and selected by the first selecting means irrespective of the data identifier.

According to a third aspect of the present invention, there is provided a data selecting apparatus, comprising: a first parameter for designating data to be selected; a second parameter for designating a field to be selected; Parameter storage means for storing a fifth parameter for designating the data, data composed of a plurality of fields, delimited by a certain size, a data identifier, data order information indicating the order, and a data length. Input means for sequentially inputting packet data including a data length indicating the length of the data and data start information indicating that the beginning of the data exists in the divided range, based on the first parameter and the data identifier. First selecting means for separating and selecting packet data;
Continuity determining means for determining whether or not the data order information is continuous, outputting continuity error information according to the data start information, counting the number of selected data, and based on the data length The remaining data number counting means for counting the number of remaining data, the data start information, the value of the remaining data number counted by the remaining data number counting means, the continuity error information, and the second parameter. A second selecting means for separating and selecting the data and outputting the additional information and the continuity error information on the basis of the data, and separating the data separated and selected by the second selecting means into the fifth parameter And a third selection unit that further separates and selects the output based on the additional information.

According to a fourth aspect of the present invention, in the data selection apparatus according to the third aspect, the data order information is not continuous, and the data start information indicates that data is newly started. The second selection means selects newly started data,
The previous data is not selected.

According to a fifth aspect of the present invention, there is provided a data selection device comprising: a first parameter for designating data to be selected; a second parameter for designating a field to be selected; a payload to be selected; A parameter storage means for storing a fifth parameter designating a parameter, data composed of a plurality of fields, delimited by a certain size, a data identifier, and the beginning of the data in the delimited range. Data input means for sequentially inputting the packet data which is the last of the separated data, the data input means including data start information indicating the fact that the data has been transmitted, and a data length indicating the length of the data. A first method for separating and selecting packet data based on an identifier
Selecting means, byte position counting means for counting the number of bytes of the data divided for each of the selected fixed sizes, and counting the number of selected data, and determining the number of remaining data based on the data length. Means for counting the number of remaining data, outputting the end position consistency error information according to the value of the number of remaining data counted by the remaining data number counting means and the end position of the divided data. End position consistency determination means, and selects and outputs data from the end position of the data to the end of the divided data based on the end position consistency error information, the second parameter, and the data start information. A second selection unit that outputs additional information and error information, and data separated and selected by the second selection unit.
And a third selection unit that further separates and selects the fifth parameter and the additional information based on the fifth parameter and the additional information.

According to a sixth aspect of the present invention, in the data selection apparatus according to the fifth aspect, the end position consistency determination means determines that the end position of the data coincides with the end of the divided data. If there is no such information, the end position consistency error information is output.

According to a seventh aspect of the present invention, there is provided a data selecting apparatus comprising: a first parameter for designating data to be selected; a second parameter for designating a field to be selected; , A third parameter indicating whether descrambling is required, a fourth parameter indicating whether descrambling is required, and a plurality of fields. Contains data separated by the size of the data, a data identifier, data start information indicating that the beginning of the data exists in the separated range, and scramble information indicating whether the data is scrambled. Packet data based on input means for sequentially inputting packet data and the first parameter and the data identifier; First descrambling means for separating and selecting the data, descrambling means for descrambling data based on the scramble information and the fourth parameter, and rewriting the scramble information, the rewritten scramble information, A scramble error determining unit that outputs scramble error information based on the three parameters; and a scramble error information based on the scramble error information, the second parameter, and the data start information.
A second selection unit that separates and selects data and outputs additional information and error information, and further separates the data separated and selected by the second selection unit based on the fifth parameter and the additional information. Third to select and output separately
Selection means.

The data selection device according to claim 8 of the present invention is the data selection device according to claim 7, wherein
The selecting means does not select data when the data requiring descrambling is not descrambled.

According to a ninth aspect of the present invention, there is provided a data selecting apparatus comprising: a first parameter for designating data to be selected; a second parameter for designating a field to be selected; A parameter storage means for storing a fifth parameter designating a parameter, data composed of a plurality of fields, delimited by a certain size, a data identifier, and the beginning of the data in the delimited range. Input means for sequentially inputting packet data including data start information indicating that the data is present, a data length indicating the length of the data, and start position information indicating a position at which the data starts, the first parameter and the data identifier First selecting means for separating and selecting packet data based on the above, and counting the number of selected data, and based on the data length, Determining the consistency between the value of the remaining data number counted by the remaining data number counting means and the start position information. Start of outputting first start position matching error information that the value of the remaining data number counted by the remaining data number counting means is erroneous and second start position matching error information that the start position information is erroneous Position consistency determination means,
Adding the information of the first start position matching error to the previous data, adding the information of the second start position matching error to the subsequent data, and based on the second parameter and the data start information, Second selecting means for separating and selecting the data and outputting the additional information, and further separating the data separated and selected by the second selecting means on the basis of the fifth parameter and the additional information. And third selecting means for selecting and outputting.

According to a tenth aspect of the present invention, in the data selection apparatus according to the ninth aspect, the second start position matching error information output by the start position consistency determination means is the data start information. It is assumed that the data is continuously output until the next segmented data with the mark.

[0023] According to a eleventh aspect of the present invention, there is provided a data selection device comprising: a first parameter for designating data to be selected;
A second parameter for specifying a field to be selected and a fifth parameter for specifying a payload to be selected, a data output destination, and the like.
Parameter storage means for storing parameters, data composed of a plurality of fields, delimited by a certain size, a data identifier, and a data start indicating that the beginning of the data exists in the delimited range. Input means for sequentially inputting packet data including information and data format information indicating the format of the data, and possibly including data error detection information for detecting a data error; First selecting means for separating and selecting packet data based on the data identifier;
First data error information based on a predetermined calculation result for the data error detection information and the data format information;
Data error determining means for outputting second data error information based only on a predetermined calculation result for the data error detection information, and adding two pieces of information, the first data error information and the second data error information, to the data And
Based on the second parameter and the data start information, the data is separated and selected and output, and second selection means for outputting additional information, and the data separated and selected by the second selection means, And a third selection unit that further separates and selects the output based on the fifth parameter and the additional information.

According to a twelfth aspect of the present invention, in the data selection apparatus according to the eleventh aspect, the first data error information output by the data error determination means includes an error in data and is not valid. It is intended to represent that.

According to a thirteenth aspect of the present invention, the data selecting means comprises: a first parameter for designating data to be selected;
A second parameter for specifying a field to be selected and a fifth parameter for specifying a payload to be selected, a data output destination, and the like.
A third parameter indicating whether or not descrambling is required
A parameter storage means for storing a parameter and a fourth parameter indicating whether or not to descramble the data, a plurality of fields, data delimited by a certain size, a data identifier, and the delimited data Data start information indicating that the head of data exists in the range, data order information indicating the order, data length indicating the length of data, start position information indicating the position where the data starts, and the data And scramble information indicating whether or not the data is scrambled, and the end is always the end of the delimited data, and packet data which may include data error detection information for detecting data errors is sequentially input. A first input for separating and selecting packet data based on the first parameter and the data identifier. And a continuity determining means for determining whether or not the data order information is continuous, outputting continuity error information in accordance with the data start information, and counting the number of selected data. Remaining data number counting means for counting the number of remaining data based on the length, byte position counting means for counting the number of bytes of data selected for each of the selected fixed sizes, and remaining data number counting means End position consistency determination means for outputting end position consistency error information according to the value of the number of remaining data counted by the above and the end position of the segmented data, the scramble information and the fourth parameter Descrambling means for descrambling the data and rewriting the scramble information on the basis of Consistency between the scramble error determining means for outputting scramble error information based on the scramble information and the third parameter, the value of the remaining data number counted by the remaining data number counting means, and the start position information Is determined, and when there is no consistency, the first start position matching error information that the value of the number of remaining data counted by the remaining data number counting means is erroneous and the start position information are erroneous are determined. First position error determining means for outputting second start position alignment error information; first data error information based on data; a predetermined calculation result for the data error detection information; and data format information; Data error determination means for outputting second data error information based only on a predetermined calculation result for the error detection information; Information of the first start position alignment error is added to previous data, information of the second start position alignment error is added to subsequent data, and the first data error information and the second data error information are added. Are added to the data, and the data separated and selected by the first selecting means is divided into the second parameter, the data start information, the continuity error information, and the remaining data count. Means for separating and selecting a plurality of fields for output based on the value of the number of remaining data counted by the means, the end position consistency error information, and the scramble error information. Second selection means for outputting the end position consistency error information and the scramble error information, and the data separated and selected by the second selection means. Serial based on the fifth parameter and the additional information, the third to output further separation selectivity to
Selection means.

According to a fourteenth aspect of the present invention, in the data selection apparatus according to the thirteenth aspect, the second selection means is configured to select a specific field of the data separated and selected by the first selection means. Irrespective of the data identifier, and the data order information is not continuous, and the data start information indicates that data is newly started. The data to be newly started is not selected, the data before the selected data is not selected, and when the data requiring descrambling is not descrambled, the data is not selected. The gender determining means may output the end position consistency error information when the end position of the data does not match the end of the separated data. The second start position matching error information output by the start position consistency determination means is output continuously until the next segmented data on which the data start information stands, and It is assumed that the first data error information output by the determination means indicates that the data contains an error and is not valid.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, MPE
A description will be given of a data selection device for selecting various information transmitted as data in a section or PES packet format as necessary in digital broadcasting conforming to the G system standard.

In digital broadcasting, video, audio, and various kinds of information are transmitted by TS (Transport Stream). FIG. 4 shows the format of the TS. TS is 18
It is composed of an 8-byte fixed length TSP (Transport Stream Packet). TSP is a header,
It consists of three parts: AF (Adaptation Field) and PL (Payload). First, these formats will be described.

The header has a fixed length of 4 bytes, an 8-bit synchronization byte, a 1-bit PUSI (payload unit start indicator), and a 13-bit PI.
D (packet ID), 2-bit TSC (Transport Scrambling Control), 2-bit A
It is composed of data such as FC (Adaptation Field Control) and 4-bit CC (Continuity Counter). PUSI = 1 indicates that a section or a PES packet in the TSP starts from the first byte, that is, newly starts. PUSI = 0 indicates that there is no newly started section in the TSP and no PES packet.

TSC = 0 indicates that no scramble is applied. If the TSC is other than 0, it depends on the broadcaster, but usually indicates that predetermined scrambling is applied. AFC = 1 indicates that the TSP has no AF and PL, and AFC = 2
Indicates that there is AF and no PL, and AFC =
3 indicates that there are both AF and PL. The CC is a counter value that counts independently and circulates from 0 to 15 in the same PID, and is used to check whether the TSP is missing in the transmission path.

AF has a variable length, and the first byte is A
The F data length (hereinafter abbreviated as AFL) indicates the number of bytes of AF data following the F data length.

The PL has a data length obtained by subtracting a 4-byte header and a (AFL + 1) -byte AF from the 188-byte TSP. Depending on the type of data,
The format stored in the TSP is different. Here, two types of sections and PES packets will be described.

FIG. 5 shows the section format and TSP.
The following describes the storage method for the file. The section 130 includes an 8-bit TID (table ID), a 1-bit SSI (section syntax indicator), a 12-bit section data length, section data, and the like. The TID is a TID separated and selected by the PID.
This is an identifier for further selecting an SP. SS
I = 1 indicates that the data conforms to a format called a normal section format, and a 4-byte CRC exists at the end of data. CRC is an error detection code, and is set so that when the data of the section is operated according to a predetermined calculation formula, the result is all 0 (all 32 bits are 0). Therefore, when the operation result is not all 0, it is considered that there is some abnormality in the data of the section. SSI = 0 indicates that the format is not specified in the MPEG standard.
It depends on the content of the broadcaster and section data.
Therefore, whether or not the CRC exists also depends on the broadcaster and the contents of the section data.

Cases 1 to 6 in FIG. 5 show how the sections are stored in the TSP.
3 shows details of the section 110. Case 1 shows a case where one section data (section # 1) is included in the section and there is a surplus. The PF (pointer field) indicates from what byte the new section data starts.
Since the first byte of the section is the TID, the TID
It is a value obtained by subtracting 1 from the distance (the number of bytes) between PF and PF.
That is, in this case, PF = 0 is set. After the section ends, the remaining byte data is represented by a hexadecimal number called a stuffing byte (hereinafter abbreviated as STF).
Filled with the value of F.

Case 2 represents a case in which one section data (section # 1) just enters the section or crosses the next TSP (of the same PID). Case 3 shows a continuation of case 2 and starts and ends in the middle of section # 1, and the remainder is filled with STF. Case 4 also shows a continuation from case 2, starting in the middle of section # 1 and ending just or in the next (same PID
2) TSP. Cases 5 and 6 also show a case following the case 2 and show a case where another section # 2 follows the section # 1. TID must be a value other than FF to distinguish it from STF. The PF indicates the start position of section # 2, and has the same value as the data length (= number of bytes) of section # 1 in this section.

FIG. 6 shows the format of the PES packet and T
The storage method in the SP will be described. PES packet 140
Is a 24-bit packet start code prefix (hereinafter abbreviated as PSCP), an 8-bit SID
(Stream ID), 16-bit PES packet data length, PES packet data, and the like. SI
D is an identifier for further separating and selecting the TSP separated and selected by the PID.

Cases 2 and 4 in FIG. 6 show how the PES packet is stored in the TSP. 5 illustrates details of the PES packet unit 120 illustrated in FIG. The case numbers correspond to the case numbers in FIG. Case 2 represents a case where the PES packet # 1 starts and ends from the TSP or straddles the next (the same PID) TSP. Case 4 represents a continuation of Case 2 and starts in the middle of PES packet # 1 and ends just there, or crosses over the next TSP (of the same PID). Since an STF such as a section is not allowed in the PES packet, case 1 in FIG.
In case 3 and there is no case, the PES packet must always end at the end of the TSP. Therefore, the data length of the AF is adjusted so that the PES packet ends at the end of the TSP. Also, PE
Since the S packet is not allowed to start a new data after the end of the previous data as in the section, the state like the case 5 and the case 6 in FIG. 5 does not exist.

FIG. 1 shows the configuration of a digital broadcast receiver using the data selection device according to the present invention. After being input to the data selection device 10, the packet data, which is a TS, is analyzed and selected, and is classified and output as audio data, video data, PSI, SI, AF, and the like. Audio data and video data are AV
The audio signal and the video signal are decoded by the decoder 30. PSI, SI, AF, and error information
The information is processed by the microcomputer 31 and becomes EPG and various control information.

Hereinafter, the internal configuration and operation of the data selection device 10 will be briefly described. Data input means 11
Then, the synchronization is performed so that the timing of the change of the packet data matches the operation clock (not shown) of the data selection device 10 without changing the input packet data itself. Further, the first selecting means 12 selects packet data according to the first parameter output from the parameter storing means 14. The first parameter is which PID
Is the information indicating whether or not to extract the TSP of the same PID as one or a plurality of PIDs specified by the first parameter.
Only the TSP with D is selected and the other TSPs are discarded. Further, the descrambling unit 13 calculates T based on the fourth parameter output from the parameter storage unit 14.
The SP is descrambled, that is, descrambled. If descrambled, TSC in TSP
The bit is rewritten to 0.

Next, TSP is a byte position counting means 2
0, the remaining data number counting means 21, the start position consistency determination means 22, the end position consistency determination means 23, the continuity determination means 24, the data error determination means 25, and the scramble error determination means 26 And whether there is an error as a section. The inspection result includes first start position consistency error information, second start position consistency error information, end position consistency error information, continuity error information, first data error information, second data error information, and scramble, respectively. The error information is sent to the second selection unit 15.

FIG. 2 shows the structure of the second selecting means 15.
The data start information extracting means 52 extracts data start information (corresponding to the aforementioned PUSI) from the packet data. Further, the second separation selection determining means 51 determines whether or not the packet data is selected based on the data start information and the error information.
According to the second parameter of the parameter storage unit 14, A
It is determined whether F is also taken out separately, and is output as second separation selection information. Further, according to the second separation selection information, the packet data is selected by the second separation selection unit 50 and output to the third selection unit 16. Also, the type of the selected packet data to be outputted (AF, section, PES packet), additional information indicating invalidation of data, etc., and the error information are also output from the second separation selection determining unit 51 to the third selecting unit. Is done.

FIG. 3 shows the structure of the third selecting means 16.
The selected packet data output from the second selection means 15 is further selected by the third separation / selection unit 60, separated into audio, video, PSI, and the like, and output once to the data buffer 62 independently. After being stored, it is output. Fifth from parameter storage means 14
The parameters include TID and SID information for further selecting input data (only data having the same TID and SID are selected), and which PID data to output to audio, video, PSI, etc. Information is included. Also, AF and section and PES
Information for discriminating a packet is obtained as additional information from the second selecting means 15 and is used for separating and selecting the selected packet data. The invalidation information included in the additional information is used to cancel the data once stored in the data buffer 62.

Embodiment 1 FIG. 7 is a diagram showing a configuration of a digital broadcast receiver using the data selection device according to the first embodiment of the present invention, and FIG. 8 is a diagram for explaining the operation of this data selection device. The data selection device according to the first embodiment of the present invention shown in FIG. 7 includes a data input unit, a first selection unit, a parameter storage unit, a second selection unit, and a third selection unit of the data selection unit in FIG. It is.

The operation will be described below. Table 2 shows the second parameters output from the parameter storage means 14.
Set as shown. In Table 1, “○” indicates that the data is selected, and “×” indicates that the data is not selected, that is, discarded. (Table 1) PID AF PL 1 ○ ○ 2 × ○ 3 ○ × As shown in FIG.
It is assumed that the first selection unit 12 is composed of three types of TSPs of PID = 1, 2, and 3. The second selection means 15 separates the data into a total of six patterns by PID and AF / PL. According to Table 1, PI
AF with D = 2 and PL with PID = 3 are not selected. Therefore, AF with PID = 1, PL with PID = 1, and PI
Four types of data, PL of D = 2 and AF of PID = 3, are sent to the third selecting means 16.

As described above, according to the data selection device according to the first embodiment, it becomes possible to separately select AF and PL for each PID.

Embodiment 2 A data selection device according to a second embodiment of the present invention will be described. The data selection device according to the second embodiment of the present invention has the same configuration as the data selection device according to the first embodiment in FIG.
The selecting means sets a specific field in the data separated and selected by the first selecting means to 1 regardless of the data identifier.
The difference between the data selection device and the data selection device according to the first embodiment is that they are collectively output.

FIG. 9 is a diagram for explaining the operation of the data selection device according to the second embodiment. The operation will be described below. In the second embodiment, AF is set to P
The description will be made assuming that the information is collected into one regardless of the ID.

The second parameters output from the parameter storage means 14 are the same as in Table 1. As shown in FIG. 9, the packet data input TS is P
It is assumed that the first selection unit 12 selects all three types of TSPs having IDs of 1, 2, and 3. The second selection means 15 separates the data into a total of six patterns by PID and AF / PL. According to Table 1, PI
AF with D = 2 and PL with PID = 3 are not selected. Also, AF is combined into one regardless of PID, so AF
And three types of data, PL of PID = 1 and PL of PID = 2, are sent to the third selecting means 16.

As described above, according to the data selection device according to the second embodiment, the AF and the PL for each PID can be separately selected, and the AF can be combined into one.

Embodiment 3 FIG. 10 is a diagram showing the configuration of a digital broadcast receiver using the data selection device according to the third embodiment of the present invention, and FIG. 11 is a diagram for explaining the operation of this data selection device. The data selection device according to the third embodiment of the present invention shown in FIG. 10 is different from the data selection device according to the first embodiment in FIG. Continuity determination means for outputting continuity error information, and remaining data number counting means for counting the number of selected data and counting the number of remaining data based on the data length.

The operation will be described below. Figure 4 already
As shown in (1), there is a field called CC in the header of the TSP, and the value from 0 to 15 is incremented by 1 for each TSP having the same PID. However, 1
After 5 is 0. The continuity determining unit 24 checks this value each time a TSP having the same PID comes. If the number has increased by two or more from the previous time, it is considered that the TSP has been lost in the transmission path, and continuity error information is generated. The continuity error information is represented by a 1-bit flag as SeqErr. Also, as shown in FIG. 4, the TSP includes data start information called PUSI, and the data start information extracting means 52 extracts the data from the TSP.

As shown by the PES packet 140 in FIG. 6, the PES packet has a data length (= the number of bytes).
There is information of. The remaining data number counting means 21 retrieves this data length, subtracts 1 from the value of this data length as an initial value by 1 for each byte of valid data, counts the data, and when the count becomes 0, the data ends. Can be detected. This count value is called the remaining data number, and is represented as RemLen in FIG. 14 and 18
In the "remaining data number count value" in the figure, how the value of the remaining data number changes is shown.

Referring to FIG. 11, the operation of the second selecting means 15 will be described. Original TS before TSP was lost in the transmission path
In 300, TSPs having the same PID are arranged in TSPs # 1 to # 6. A TSP of another PID may be inserted between each TSP, but is omitted for simplicity. Also,
The value of each CC is 1 to 6. TSP # 1 to # 6
Contains data of a PES packet having a length of one or two TSPs, and is represented as P # 1 to # 4. PTS in TSP where PES packet starts newly
I = 1, and if it is a continuation from the previous TSP, PUSI = 0.

In cases 1 to 4 of FIG. 11, the operation of the second selecting means 15 when a TSP is lost on the transmission path is shown. Here, (input) is an input of the second selection unit 15, and (output) is an output of the second selection unit 15. (LOST) indicates that the TSP was lost in the transmission path, (None) indicates that there was no data due to the loss of the TSP, and (Discard) indicates that the TSP was discarded by the second selection means 15. , And (invalidation) indicates that it was discarded later. When (input) remains (output) as it is, it indicates that the selection has been made by the second selection means 15.

Case 1 shows a case where TSP # 2, TSP # 3 and TSP # 4 are missing. The value of CC is 4 from “1” of TSP # 1 to “5” of TSP # 5.
Therefore, the continuity determining unit 24 determines that the continuity of the TSP has been lost at TSP # 5, and outputs continuity error information. That is, SeqErr = 1. In addition, since the PES packet P # 1 has been completed in TSP # 1, at the start of TSP # 5, ReMlen
= 0. Since TSP # 5 is PUSI = 0, it is data from the middle of the PES packet P # 3.
In other words, the data in the first half is incomplete data that is missing and must be discarded. TSP # 6 is PUSI
Since = 1, new data starts from this TSP, and complete data can be taken out. These determinations are made by the second separation selection determining means 51.

Similarly, in case 2, TSP # 3 and TS
P # 4 is missing. Since the value of CC is discontinuous, SeqErr = 1 as in Case 1. In TSP # 2, PES packet P #
2 has not been completed, so at the start of TSP # 5, R
emmLen ≠ 0. Therefore, TSP # 2 is
The data in the latter half of the PES packet is incomplete data that is missing and must be discarded. However, TSP # 5
At this point, since TSP # 2 has been once selected, TSP # 2 is invalidated later. This invalidation is transmitted to the third selecting means 16 by the additional information, and invalidates the data of TSP # 2 stored in the data buffer 62. TSP # 6 is selected in the same manner as in case 1.

Case 3 shows a case where TSP # 2 and TSP # 3 are missing. Since the CC value is discontinuous, SeqErr = 1 at the time of TSP # 4.
Also, since the PES packet P # 1 has been completed in TSP # 1, at the start of TSP # 4, ReMlen
= 0. Since TSP # 4 has PUSI = 1, new data starts from this TSP.
It is selected because the complete data can be retrieved. Therefore,
All input TSPs other than (LOST) are selected as normal TSPs.

Case 4 shows a case where only TSP # 3 is missing. Because the value of CC is discontinuous, T
At the time of SP # 4, SeqErr = 1. Also, TS
Since the PES packet P # 2 has not ended in P # 2, RemLen ≠ 0 at the start of TSP # 4. Therefore, TSP # 2 is incomplete data in which the latter half of the PES packet is missing, and must be discarded. Since TSP # 4 has PUSI = 1, new data starts from this TSP, and complete data can be extracted.

According to the data selection device according to the third embodiment, as in cases 1 to 4, even if the CC value becomes discontinuous, whether the TSP is valid or invalid depends on the PUSI value. Can be determined, and it is not necessary to always discard a TSP having a discontinuous CC value.
Also, depending on the value of the number of remaining data, T before (LOST)
It is possible to determine whether the SP is valid or not, and it is not necessary to always discard the TSP.

Embodiment 4 A data selection device according to a fourth embodiment of the present invention will be described. The data selection device according to the fourth embodiment of the present invention has the same configuration as the data selection device according to the third embodiment in FIG. 10, and the input data in the third embodiment is a PES packet. The input data in the fourth embodiment is different in that the input data is a section. FIG. 12 shows a diagram for explaining the operation of the data selection device according to the fourth embodiment.

The operation will be described below. In the case of a section, as shown in Cases 5 and 6 in FIG. 5, a plurality of sections can be included in one TSP.
It is a specific section, not all of the sections. This will be described with reference to FIG.

The original TS before the loss of TSP in the transmission path
In 350, TSPs having the same PID are arranged in TSPs # 1 to # 6. A TSP of another PID may be inserted between each TSP, but is omitted for simplicity. The value of each CC is 1 to 6. S # 1 to # 5 represent sections, and may be included in one TSP,
In some cases, it extends over a plurality of TSPs. TSP # 1, #
3, # 5 and # 6 contain only one type of section, whereas TSP # 2 and # 4 contain two types of section. TS containing section to start newly
In P, PUSI = 1, and when only the subsequent section from the previous TSP is included, PUSI = 0.

In cases 1 to 4 of FIG. 12, the operation of the second selecting means 15 when a TSP is lost on the transmission path is shown. Here, (input), (output), (LOS
The meanings of (T), (none), (discard), and (invalidate) are the same as in the third embodiment.

Case 1 shows a case where TSP # 2, TSP # 3 and TSP # 4 are missing. The value of CC is 4 from “1” of TSP # 1 to “5” of TSP # 5.
Therefore, at the time of TSP # 5, the continuity determining unit 24 determines that the continuity of the TSP has been lost, and outputs continuity error information. That is, SeqErr = 1. In addition, since the section S # 1 has been completed in TSP # 1, the remaining data number Re at the start of TSP # 5
mLen = 0. TSP # 5 has PUSI =
Since it is 0, it is data from the middle of section S # 4. In other words, the data in the first half is incomplete data that is missing and must be discarded. These decisions are made in the second
This is performed in the separation selection determining means 51.

Similarly, in case 2, TSP # 3 and TS
P # 4 is missing. Since the value of CC is discontinuous, SeqErr = 1 as in Case 1. Also, in TSP # 2, since section S # 3 has not been completed, at the start of TSP # 5, Rem
Len ≠ 0. Therefore, section S # 3
Is incomplete data with the latter half missing, and must be discarded. Section S # 2 is TSP # 2
It does not need to be destroyed because it ends within. TSP #
At the time point 5, since the section S # 3 has been once selected, the section S # 3 is invalidated later. This invalidation is transmitted to the third selecting means 16 by the additional information, and invalidates the data of the section S # 3 stored in the data buffer 62. TSP # 6 is Case 1
Is selected in the same way as

Case 3 shows a case where TSP # 2 and TSP # 3 are missing. Since the CC value is discontinuous, SeqErr = 1 at the time of TSP # 4.
Also, since section S # 1 has been completed in TSP # 1, RemLen = 0 at the start of TSP # 4.
It has become. Since TSP # 4 is PUSI = 1, section # 4 starting from this TSP is selected because complete data can be extracted, but section # 3 has to be discarded because there is only the latter half of the data. The fact that section # 3 does not start from TSP # 4 can be determined from the fact that the PF points to section # 4.
Because, when section # 3 starts from TSP # 4, PF points to section # 3, that is, P
This is because F = 0. The PF has already been described with reference to FIG.

Case 4 shows a case where only TSP # 3 is missing. Because the value of CC is discontinuous, T
At the time of SP # 4, SeqErr = 1. Also, TS
Since section # 3 is not completed in P # 2,
At the start of TSP # 4, RemLen ≠ 0. Therefore, as in the other cases, the data in section # 3 is invalidated or discarded.

As described above, according to the data selection device according to the fourth embodiment, even if the value of CC becomes discontinuous as in cases 1 to 4, the TS
It is possible to determine whether the data of P or section is valid or invalid, and the TSP in which the value of CC is discontinuous
Need not always be discarded. Further, it becomes possible to determine whether the data of the TSP or section before (LOST) is valid or invalid based on the value of the remaining data number, and it is not necessary to always discard the TSP.

Embodiment 5 FIG. 13 is a diagram illustrating a configuration of a digital broadcast receiver using the data selection device according to the fifth embodiment of the present invention, and FIG. 14 is a diagram illustrating the operation of the data selection device. The data selection device according to the fifth embodiment of the present invention shown in FIG. 13 is different from the data selection device according to the first embodiment in FIG. 7 in that it counts the number of bytes of the data divided for each of the selected fixed sizes. Byte position counting means for counting the number of selected data, and a remaining data number counting means for counting the number of remaining data based on the data length;
An end position consistency determination unit that outputs end position consistency error information in accordance with the value of the number of remaining data and the end position of the divided data.

The operation will be described below. Figure 6 already
As described above, in the MPEG system standard,
The PES packet has data length information near the beginning, and the end of the PES packet is defined to be the 188th byte of the TSP. Byte position counting means 2
At 0, the number of the byte in the TSP is counted. It becomes 1 at the beginning of the TSP and increases by 1
It becomes 188 at the end of TSP. This is repeated for each TSP. In the remaining data number counting means 21, P
The number of remaining data of the ES packet is counted. At the beginning of the PES packet, there is a field with a data length of 2 bytes, and this value is decreased by one as an initial value.
When the PES packet ends, that is, when the number of remaining data = 0, the end position consistency determining means 23 determines that the byte position is equal to 188, and determines that the byte position is equal to 188, and determines that the byte position is not equal to 188, that is, abnormal. Then, the end position consistency error information is sent to the second selecting means 15.

In FIG. 14, the PES packet has two TSs.
The data length excluding the first 6 bytes is LEN
Assuming that the number of data that enters the first TSP among the bytes and the PES packet is L2 bytes, the number of data that enters the second TSP is L4 bytes, the MPEG system standard specifies L2 bytes.
+ L4 = LEN. When the number of data of each AF is L1 and L3 bytes, 4 + L1 + 6 + L2 =
188, 4 + L3 + L4 = 188. The data after the selection is (P +) of (6 + L2 + L4) bytes
It becomes an ES packet.

The abnormal TS 410 and 411 in FIG.
When end position consistency error information is generated, that is, P
This shows a case where the end of the ES packet does not reach the 188th byte of the TSP. The cause is that TS
Possible causes include a missing P, an abnormal data length of the AF, an abnormal data length of the PES packet, an abnormal count of the number of remaining data, and the like. Complicated judgment is required. Therefore, the last (UNKNOW) of the abnormal TS 411
Since the data indicated as N) may actually be valid data, it is better not to discard this data before identifying the cause. Therefore, as shown by the selected data 412 in FIG. 14, the second selecting unit 15 sets (6 + L2
+ L4) bytes of data (UNKN) from the time when the value of the remaining data number becomes 0 to the end of the TSP.
OWN) is also selected.

As described above, according to the data selection device of the fifth embodiment, even if the end of the PES packet does not reach the 188th byte of the TSP, the data up to the 188th byte can be selected. It becomes possible not to discard data that may be determined to be valid data other than the selected device.

Embodiment 6 FIG. FIG. 15 is a diagram showing the configuration of a digital broadcast receiver using the data selection device according to the sixth embodiment of the present invention, and FIG. 16 is a diagram for explaining the operation of this data selection device. The data selection device according to the sixth embodiment of the present invention shown in FIG. 15 is configured such that the data selection means according to the first embodiment shown in FIG. 7 descrambles the data based on the scramble information and the fourth parameter, And scramble error determination means for outputting scramble error information based on the rewritten scramble information and the third parameter.

The operation will be described below. MPEG
According to the system standard, data, particularly audio and video data, can be scrambled to prevent unauthorized use of the data. The descrambler 13 descrambles the scramble. The TSP header has a 2-bit field called TSC (Transport Scrambling Control).
TSC = 0 indicates “no scrambling”, and TS
C ≠ 0 is “user defined” as an MPEG system standard, and is usually “scrambled”. In addition, TS including audio and video data
The PID information of P and the information on whether or not the data is scrambled are extracted by the microcomputer by interpreting and processing the PSI sent by another PID, and the microcomputer based on the information. You can set descrambling.

FIG. 16 shows data processing with and without scrambling. Case 1 shows a case of normal processing. The output 500 of the first selecting means “with scramble” is descrambled by the descrambling means 13 in the PL section based on the fourth parameter, and the TSC bit is rewritten to 0. After that, the A / V data 503 which is separated and selected by the second selecting means 15 and the third selecting means 16 and which is not scrambled.
Becomes Then, it is decoded by the AV decoder 30 and
Normal audio and video are output.

Case 2 shows a case where some trouble such as a setting mistake by the microcomputer has occurred in the conventional data selection means. The data 511 of "scrambled" which has passed through the descrambling means 13 is separated and selected as A / V data as it is, and is input to the AV decoder, thereby outputting abnormal audio and video.

Case 3 shows a case where some trouble such as a setting error by the microcomputer occurs in the present invention. The output data 521 indicating “scrambled” that has passed through the descrambler 13 is input to the second selector 15. In addition, scramble error information is generated in the scramble error determination means 26 based on the third parameter indicating whether or not scrambling is allowed and the scramble information in the TSP, and is input to the second selection means 15. That is, if the third parameter is “not good to be scrambled”, and TSCＴ
If 0 (scrambled), scramble error information is generated. The second selecting means 15 discards the TSP when the scramble error information has occurred, and prevents the third selecting means 16 from outputting the scrambled audio data or video data. Since no data arrives at the AV decoder 30,
It is not necessary to output abnormal audio and video signals.

As described above, according to the data selection device according to the sixth embodiment, even when some trouble such as a setting error by the microcomputer occurs, the data which should not be scrambled remains scrambled. It is possible to prevent output.

Embodiment 7 FIG. FIG. 17 is a diagram showing a configuration of a digital broadcast receiver using the data selection device according to the seventh embodiment of the present invention, and FIGS. 18 and 19 are diagrams for explaining the operation of this data selection device. is there.

The data selection device according to the seventh embodiment of the present invention shown in FIG. 17 is different from the data selection device according to the first embodiment in FIG. 7 in that the number of selected data is counted, and based on the data length, A remaining data number counting means for counting the number of remaining data, and determining whether the value of the remaining data is consistent with the start position information. The apparatus is provided with a start position matching determination unit that outputs start position matching error information and second start position matching error information indicating that there is an error in the start position information.

The operation will be described below. Figure 5 already
As described above, in the MPEG system standard,
The section has data length information near the beginning,
It indicates the number of bytes of the subsequent section data (including the CRC if there is a CRC). Therefore, if the remaining data number counting means 21 sets the initial value to the data length and decrements it by one for each data, the point where it becomes 0 is the end of the section. In the MPEG system standard, a section includes a plurality of T
In addition to being able to span SPs, a plurality of sections can be arranged continuously. If the data immediately after the end of the section is converted to hexadecimal FF, TS
The data up to the end of P is treated as STF (stuffing byte) and can end a continuous section. Due to such a section-specific format, as shown in FIG. 5, there is data indicating start position information called PF, and points to the first byte position of a section newly started in the TSP.

Therefore, regarding the start / end position of the section, there are two types of indices, the value of the number of remaining data and the PF, and they are usually matched. However, if any error such as a missing TSP occurs, The consistency of the two indices cannot be obtained. This is shown in FIG. In FIG. 19, Case 1 is a case where the value of PF is abnormal and too small, Case 2 is a case where the value of PF is abnormal and too large, Case 3 is a case where the value of the number of remaining data is abnormal and too small,
Case 4 represents a case where the value of the number of remaining data is abnormal and too large. In actual selection of section data, one of the value of the number of remaining data and the PF must be used as a reference. In the seventh embodiment, the PF is used as a reference, and the above-described consistency determination is performed by the start position consistency determination unit 22.

When the value of the number of remaining data and the PF become inconsistent, not only the section counting the number of remaining data and the next section, but also the following sections, the data is not necessarily correct. Disappears.
Because multiple sections can be arranged consecutively, if the byte position pointed to by the PF is incorrect, a field that is not the data length will be recognized as the data length. Everything will not be correctly recognized. The effect of the consistency mismatch disappears when the next PF appears. Of course, if the value of this PF is wrong,
Although the abnormality of the data continues, the probability of making a mistake twice in succession is the square of the probability of making a mistake twice, so it can be said that the probability is extremely low.

The start position consistency determination means 22 generates two types of error information of first start position consistency error information and second start position consistency error information when the consistency of the start position cannot be obtained. , Corresponding to the section. FIG.
FIG. In FIG. 18, section # 1, section # 2, and section # 3 are continuous sections, and section # 4 is a newly started section. The first start position consistency error information is referred to as “PF
Error "and the second start position consistency error information will be referred to as" CPF error "for simplicity.

The "PF error" indicates the possibility that the value of the number of remaining data is abnormal, and is added to the section (section # 1 in FIG. 18) where the number of remaining data was counted when inconsistency occurred. I do. "CPF error" is P
The value of F indicates the possibility of an abnormality, and is added to a section (section # 2 in FIG. 18) that starts when an inconsistency occurs and a section (section # 3 in FIG. 18) subsequent thereto. Next, the addition is continued up to the section before the section (section # 4 in FIG. 18) that newly starts with PUSI = 1. These two pieces of error information are not directly used for selection by the second selection means 15 but output to the microcomputer 31 through the second selection means 15 and used for detailed check of section data in the microcomputer 31.

As described above, according to the data selection device of the seventh embodiment, when the consistency between the value of the number of remaining data and the PF (start position information) is lost, the data before and after the byte position indicated by the PF Each section indicates a different error possibility and can be used for detailed analysis of errors later.

Embodiment 8 FIG. FIG. 20 is a diagram showing the configuration of a digital broadcast receiver using the data selection means according to the eighth embodiment of the present invention, and FIG. 21 is a diagram for explaining the operation of this data selection device. The data selection means according to the eighth embodiment of the present invention shown in FIG. 20 is different from the data selection device according to the first embodiment shown in FIG. 7 in that the data selection means based on a predetermined operation result for data and data error detection information and data format information. 1 based on only data error information and a predetermined calculation result for the data error detection information.
It is provided with data error determination means for outputting data error information.

The operation will be described below. As described above with reference to FIG. 5, in the MPEG system standard,
The section has a bit called SSI (Section Syntax Indicator), and the format differs according to this bit. FIG. 21 shows SSI = 1,
0 indicates a section, and SSI = 1 indicates that the data conforms to a format called a normal section format, and a 4-byte CRC exists at the end of data. SSI = 0 indicates that the format is not specified, and depends on the broadcaster and the contents of the section data. Therefore, whether or not a CRC exists,
It depends on the content of the broadcaster and section data.
The data error determination device 25 calculates the CRC according to a predetermined calculation formula. Here, the operation itself relating to CRC will not be described, but if the data includes a CRC, if the operation result is all 0s (all bits of the 32-bit operation result are 0), the data is correct and must be all 0s. If the data is incorrect.

In the case of SSI = 1, the CRC is always included, so if the operation result is not all 0, it can be said that there is an error in the data. However, in the case of SSI = 0, the CRC is not necessarily included. Therefore, it is not known from the operation result alone whether there is an error in the data. SSI
When = 0, whether the section includes a CRC depends on the TID and data for further classifying the section included in the data near the head of the section data. , Its format is different. Therefore, the data error determination device 2
5 generates second data error information indicating whether or not the CRC calculation result is all 0, in addition to the first data error information indicating the error of the CRC calculation result when SSI = 1, and performs the second selection. Send to means 15.

If the first data error information has occurred, the section contains an error, and can be discarded by the second selecting means 15. When the second data error information has been generated, it cannot be determined whether or not an error is contained unless detailed analysis of the section data is performed. Therefore, only the second data error information is added to the section data. After that, the microcomputer 31
Perform a detailed analysis to determine whether to select or discard the data.

As described above, according to the data selection device of the eighth embodiment, two data error information, that is, the error information based on the CRC calculation result and the data format information and the error information based only on the calculation result, are obtained. By generating the information, it is possible to separately obtain the information on the occurrence of the error and the information on the possibility of the occurrence of the error.

Embodiment 9 FIG. FIG. 1 shows a configuration of a digital broadcast receiver using a data selection device according to Embodiment 9 of the present invention. The data selection device according to the ninth embodiment is different from the data selection device according to the first or second embodiment in that the continuity determination unit and the remaining data counting unit in the third or fourth embodiment are different from the data selection device according to the fifth embodiment. , Byte position counting means, remaining data number counting means, descrambling means, scramble error determining means in the sixth embodiment, and start position consistency determining means in the seventh embodiment. , And remaining data number counting means,
A data error determining unit according to the eighth embodiment is provided.

The operation of the digital broadcast receiver using the data selection device according to the ninth embodiment of the present invention will be described below. In this digital broadcast receiver, packet data, which is a TS, is input to the data selection device 10, analyzed and selected, and classified into audio data, video data, data such as PSI, SI, and AF, and output. Is done. Audio data and video data are A
The video signal is decoded by the V decoder 30 to be an audio signal or a video signal. The PSI, the SI, the AF, and the error information are processed by the microcomputer 31 to become the EPG and various control information.

The operation of the data selection device 10 will be described below. The data input means 11 synchronizes the input packet data without changing the packet data itself so that the change timing of the packet data matches the operation clock (not shown) of the data selection device 10. Also,
The first selection unit 12 selects packet data according to the first parameter output from the parameter storage unit 14. The first parameter is information indicating which PID of the TSP is to be taken out. Only the TSP having the same PID as one or a plurality of PIDs specified by the first parameter is selected, and other TSPs are discarded. In addition, the descrambling unit 13 descrambles, that is, descrambles the TSP according to the fourth parameter output from the parameter storage unit 14. When descrambled, the TSC bit in the TSP is rewritten to 0.

Next, the TSP is used in the third to eighth embodiments.
Byte position counting means 20, remaining data number counting means 21, start position consistency determination means 2
2. End position consistency determination means 23, continuity determination means 2
4. The presence / absence of an error as a TSP or PES packet or section is checked by the data error determination unit 25 and the scramble error determination unit 26. The inspection result includes first start position consistency error information, second start position consistency error information, end position consistency error information, continuity error information, first data error information,
The second data error information and the scramble error information are sent to the second selecting means 15.

In the second selecting means 15 shown in FIG. 2, the data start information extracting means 52 extracts data start information (corresponding to the above-mentioned PUSI) from the packet data. Further, in the second separation selection determining means 51,
Based on the data start information and the error information, it is determined whether or not the packet data is selected. In addition, according to the second parameter of the parameter storage unit 14, it is determined whether the AF is also separately taken out. It is output as two-separation selection information. Further, according to the second separation selection information, the packet data is selected by the second separation selection unit 50,
The data is output to the third selecting means 16. Also, the type of the selected packet data to be outputted (AF, section, PES packet), additional information indicating invalidation of data, etc., and the error information are also output from the second separation selection determining unit 51 to the third selecting unit. Is done.

In the third selecting means 16 shown in FIG. 3, the selected packet data output from the second selecting means 15 is
In the third separation / selection unit 60, the data is further selected and output as audio, video, PSI, or the like, and once stored in the data buffer 62 independently.
Is output. The fifth parameter from the parameter storage means 14 includes a TI for further selecting input data.
D and SID information (only data having the same TID and SID are selected), and a plurality of information such as which PID data is output to audio, video, PSI, and the like. Further, information for distinguishing between the AF or section and the PES packet is obtained as additional information from the second selecting means 15 and is used for separating and selecting the selected packet data. The invalidation information included in the additional information is used to cancel the data once stored in the data buffer 62.

As described above, according to the data selection device of the ninth embodiment, the data selection processing is executed by small-scale hardware, and various errors can be dealt with in advance by hardware. By performing the processing, it is possible to minimize the data discard due to the error and the occurrence of another error induced, and reduce the processing load on the microcomputer.

[0100]

According to the first aspect of the present invention, by adding a parameter for designating a field to be selected in the determination of separation selection, subsequent selection becomes unnecessary.
As compared with the conventional data selection device which is separated and selected later by a microcomputer or the like, there is an effect that a data selection device which can reduce subsequent processing can be obtained.

According to the second aspect of the present invention,
By adding separate selection using parameters that specify the fields to be selected while collecting the data of a specific field into one, sorting afterwards becomes unnecessary, and not only can subsequent processing by microcomputers be reduced. In addition, there is an effect that it is possible to obtain a data selection device capable of suppressing an increase in the circuit scale due to an increase in the types to be separated and selected.

According to the third or fourth aspect of the present invention, validity / invalidity of data is determined in accordance with the data start information, the value of the number of remaining data, and the continuity error information, and the data is separated and selected. This makes it possible to obtain a data selection device that can reduce the amount of data to be discarded when continuity error information occurs, as compared with a conventional data selection device that discards data when continuity error information occurs. There is.

According to the fifth or sixth aspect of the present invention, the end position of the data is determined according to the value of the number of remaining data and the end position of the separated data to separate and select the data. By doing so, less data is discarded when the end position consistency error information occurs, compared to a conventional data selection device that determines the end position of data only according to the value of the remaining data number and separates and selects data. There is an effect that it is possible to obtain a data selection device that can perform the data selection.

According to the seventh or eighth aspect of the present invention, data is selected or discarded based on scramble information and a parameter indicating whether or not the data may remain scrambled. Compared with a conventional data selection device that ignores whether or not to remain scrambled, it is possible to obtain a data selection device that can prevent occurrence of an abnormal signal in an audio signal or a video signal that is finally converted. There is an effect that can be.

According to the ninth or tenth aspect of the present invention, two types of start position matching are performed on the data before and after the data based on the value of the number of remaining data and the consistency of the start position information. A conventional data selection method in which, when consistency error information is generated and the data is selected and detailed selection is performed later, at least one of the data before and after the data is discarded when consistency is not achieved. As compared with the device, there is an effect that a data selection device capable of selecting or discarding data accurately can be obtained.

Further, according to claim 11 or 12 of the present invention.
According to the invention, two types of data error information are generated and separated and selected according to a predetermined calculation result for the data error detection information and the data format information, and a detailed selection is performed later. Only in the case of a specific data format, compared to a conventional data selection device that has determined a predetermined operation result for the data error detection information and separated and selected data, for a different data format, There is an effect that it is possible to obtain a data selection device that does not need to separately perform an operation related to data error detection.

Further, according to the thirteenth or fourteenth aspect of the present invention,
According to the invention, data input means, parameter storage means, first selection means, second selection means, third selection means, continuity determination means, remaining data number counting means,
End position consistency determining means, byte position counting means, remaining data number counting means, descrambling means, scramble error determining means, start position consistency determining means, remaining data number counting means, data error determination Means to perform data selection processing with small-scale hardware, and to deal with various errors in advance by hardware, so that data discarding due to errors or other This has the effect of minimizing the occurrence of errors and reducing the processing load on the microcomputer.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a data selection device according to a ninth embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a second selection unit according to the present invention.

FIG. 3 is a diagram showing a configuration of a third selection unit in the present invention.

FIG. 4 is a diagram illustrating a format of a transport stream packet.

FIG. 5 is a diagram illustrating a format of a section.

FIG. 6 is a diagram illustrating a format of a PES packet.

FIG. 7 is a diagram showing a configuration of a data selection device according to the first and second embodiments of the present invention.

FIG. 8 is a diagram for explaining an operation of the data selection device according to the first embodiment of the present invention.

FIG. 9 is a diagram for explaining an operation of the data selection device according to the second embodiment of the present invention.

FIG. 10 is a diagram showing a configuration of a data selection device according to Embodiments 3 and 4 of the present invention.

FIG. 11 is a diagram for explaining an operation of the data selection device according to the third embodiment of the present invention.

FIG. 12 is a diagram for explaining an operation of the data selection device according to the fourth embodiment of the present invention.

FIG. 13 is a diagram showing a configuration of a data selection device according to a fifth embodiment of the present invention.

FIG. 14 is a diagram for explaining an operation of the data selection device according to the fifth embodiment of the present invention.

FIG. 15 is a diagram showing a configuration of a data selection device according to a sixth embodiment of the present invention.

FIG. 16 is a diagram for explaining an operation of the data selection device according to the sixth embodiment of the present invention.

FIG. 17 is a diagram illustrating a configuration of a data selection device according to a seventh embodiment of the present invention.

FIG. 18 is a diagram for explaining an operation of the data selection device according to the seventh embodiment of the present invention.

FIG. 19 is a diagram for explaining an operation of the data selection device according to the seventh embodiment of the present invention.

FIG. 20 is a diagram illustrating a configuration of a data selection device according to an eighth embodiment of the present invention.

FIG. 21 is a diagram illustrating an operation of the data selection device according to the eighth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 data selection device 11 data input means 12 first selection means 13 descrambling means 14 parameter storage means 15 second selection means 16 third selection means 20 byte position counting means 21 remaining data count Means 22 ... Start position consistency judgment means 23 ... End position consistency judgment means 24 ... Continuity judgment means 25 ... Data error judgment means 26 ... Scramble error judgment means 30 ... AV decoder 31 ... Microcomputer 50 ... Second separation / selection section 51 ... Second separation selection judging means 52... Data start information extracting means 60... Third separation selection section 61... Third separation selection judging means 62... Data buffer 100... Transport stream 101. 103: adaptation field 104: page Loading 110 ... section portion 120 ... PES packet unit

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Claims (14)

[Claims] 1. A parameter for storing a first parameter for specifying data to be selected, a second parameter for specifying a field to be selected, and a fifth parameter for specifying a payload to be selected, an output destination of data, and the like. Packet data including storage means, data composed of a plurality of fields, delimited by a certain size, a data identifier, and data start information indicating that the beginning of the data exists in the delimited range Based on the first parameter and the data identifier.
First selecting means for separating and selecting the packet data; and further separating and selecting the data separated and selected by the first selecting means into a plurality of fields based on the second parameter and the data start information. A second selecting means for outputting additional information, and a third selecting means for further separating and selecting data separated and selected by the second selecting means on the basis of the fifth parameter and the additional information. And a data selecting device. 2. The data selection device according to claim 1, wherein the second selection unit sets a specific field in the data separated and selected by the first selection unit to one regardless of the data identifier. A data selection device for outputting data in a lump. 3. A parameter for storing a first parameter for specifying data to be selected, a second parameter for specifying a field to be selected, and a fifth parameter for specifying a payload to be selected, an output destination of data, and the like. Storage means, data composed of a plurality of fields, delimited by a certain size, a data identifier, data order information indicating the order, a data length indicating the length of the data, and the delimited data Data input means for sequentially inputting packet data including data start information indicating that a head of data is present in the range; based on the first parameter and the data identifier,
First selecting means for separating and selecting packet data; continuity determining means for determining whether the data order information is continuous and outputting continuity error information according to the data start information; Counting the number of data, based on the data length, the remaining data number counting means for counting the number of remaining data, the data start information, the value of the number of remaining data counted by the remaining data number counting means, A second selection unit that separates and outputs data based on the continuity error information and the second parameter and outputs additional information and the continuity error information; Third selection means for further separating and selecting the separated and selected data based on the fifth parameter and the additional information and outputting the separated data. Data selection device. 4. The data selection device according to claim 3, wherein the second selection means indicates that the data order information is not continuous and the data start information indicates that data is newly started. A data selection device for selecting newly started data and not selecting data before the newly started data. 5. A parameter for storing a first parameter for specifying data to be selected, a second parameter for specifying a field to be selected, and a fifth parameter for specifying a payload to be selected, an output destination of data, and the like. Storage means, data composed of a plurality of fields, delimited by a certain size, a data identifier, data start information indicating that the beginning of the data exists in the delimited range, and a data length Data input means for sequentially inputting the packet data which is the last of the delimited data, based on the first parameter and the data identifier.
First selecting means for separating and selecting packet data; byte position counting means for counting the number of bytes of the data divided for each of the selected fixed sizes; counting the number of selected data; The remaining data number counting means for counting the number of remaining data based on the length, the value of the remaining data number counted by the remaining data number counting means, and the end according to the end position of the divided data. An end position consistency determining unit that outputs position consistency error information; and an end position consistency error information based on the end position consistency error information, the second parameter, and the data start information. A second selecting means for selecting and outputting data up to the end and outputting additional information and error information; A releasing selected data, the data selection device according to the fifth on the basis of the parameters and the additional information, characterized by further comprising a third selection means for separating selected and output. 6. The data selection device according to claim 5, wherein the end position consistency determination unit determines the end position consistency error when the end position of the data does not match the end of the divided data. A data selection device for outputting information. 7. A first parameter for specifying data to be selected, a second parameter for specifying a field to be selected, a fifth parameter for specifying a payload to be selected, an output destination of data, and the like, and descrambling. Parameter storage means for storing a third parameter indicating whether it is necessary or not and a fourth parameter indicating whether or not to descramble; data which is composed of a plurality of fields and is divided for each fixed size; Input means for sequentially inputting packet data including a data identifier, data start information indicating that the head of data exists in the delimited range, and scramble information indicating whether the data is scrambled; Based on the first parameter and the data identifier,
First selecting means for separating and selecting packet data, descrambling means for descrambling data based on the scramble information and the fourth parameter, and rewriting the scramble information; A scramble error determining means for outputting scramble error information based on the third parameter; separating and selecting data based on the scramble error information, the second parameter and the data start information; And a second selecting means for outputting error information, and a third selecting means for further selecting and outputting the data separated and selected by the second selecting means based on the fifth parameter and the additional information. And a data selecting device. 8. The data selection device according to claim 7, wherein said second selection means does not select data when data requiring descrambling is not descrambled. Data selection device. 9. A parameter for storing a first parameter for specifying data to be selected, a second parameter for specifying a field to be selected, and a fifth parameter for specifying a payload to be selected, an output destination of data, and the like. Storage means, data composed of a plurality of fields, delimited by a certain size, a data identifier, data start information indicating that the beginning of the data exists in the delimited range, and a data length Input means for sequentially inputting packet data including a data length indicating the data length and start position information indicating a position where the data starts, based on the first parameter and the data identifier,
First selecting means for separating and selecting the packet data, remaining data number counting means for counting the number of selected data and counting the number of remaining data based on the data length, and counting by the remaining data number counting means. And determining whether the value of the remaining data number counted by the remaining data number counting means is erroneous if there is no consistency. (1) a start position matching determination unit that outputs the start position matching error information and a second start position matching error information indicating that the start position information has an error; And adding the information of the second start position matching error to the subsequent data, and separating the data based on the second parameter and the data start information. Second selecting means for selectively outputting the additional information, and further separating and selecting the data separated and selected by the second selecting means on the basis of the fifth parameter and the additional information. A data selection device, comprising: third selection means for outputting. 10. The data selection device according to claim 9, wherein the second start position matching error information output by the start position consistency determination means is up to the next segmented data on which the data start information stands. A data selection device that is continuously output. 11. A parameter for storing a first parameter for specifying data to be selected, a second parameter for specifying a field to be selected, and a fifth parameter for specifying a payload to be selected, an output destination of data, and the like. Storage means, data composed of a plurality of fields, delimited by a certain size, a data identifier, data start information indicating that the beginning of the data exists in the delimited range, and data Data format information indicating the format,
Input means for sequentially inputting packet data which may include data error detection information for detecting data error, based on the first parameter and the data identifier,
First selecting means for separating and selecting packet data; first data error information based on the data, the predetermined operation result on the data error detection information, the data format information, and predetermined operation on the data error detection information Data error determination means for outputting second data error information based only on the result; adding two pieces of information, the first data error information and the second data error information, to the data; A second method for separating and selecting data based on the data start information and outputting the data and outputting additional information.
Selecting means, and third selecting means for further selecting and outputting the data separated and selected by the second selecting means based on the fifth parameter and the additional information. Data selection device. 12. The data selection device according to claim 11, wherein the first data error information output by the data error determination means indicates that the data contains an error and is not valid. Data selection device. 13. A descrambler comprising: a first parameter for designating data to be selected; a second parameter for designating a field to be selected; a fifth parameter for designating a payload to be selected and an output destination of data; Parameter storage means for storing a third parameter indicating whether it is necessary or not and a fourth parameter indicating whether or not to descramble; data which is composed of a plurality of fields and is divided for each fixed size; A data identifier, data start information indicating that the beginning of the data exists in the delimited range, data order information indicating the order, data length indicating the length of the data, and a position where the data starts are displayed. Starting position information and scramble information indicating whether or not the data is scrambled. Finally a and a data input means for sequentially inputting the packet data that may include data error detection information for detecting an error of the data, based on the first parameter and the data identifier,
First selecting means for separating and selecting packet data; continuity determining means for determining whether the data order information is continuous and outputting continuity error information according to the data start information; Remaining data number counting means for counting the number of data and counting the number of remaining data based on the data length, and a byte position count for counting the number of bytes of data selected for each of the selected fixed sizes Means, end position consistency determination means for outputting end position consistency error information according to the value of the number of remaining data counted by the remaining data number counting means, and the end position of the divided data; And descrambling the data based on the scramble information and the fourth parameter and rewriting the scramble information. Descrambling means, scramble error determining means for outputting scramble error information based on the rewritten scramble information and the third parameter, and a value of the number of remaining data counted by the remaining data number counting means. Determining the consistency with the start position information, and if there is no consistency, determines that the value of the remaining data number counted by the remaining data number counting means is erroneous; Start position consistency determination means for outputting second start position matching error information indicating that there is an error in the start position information; data; a predetermined calculation result for the data error detection information; and the data format information A second data error based on only the first data error information and a predetermined calculation result for the data error detection information. Data error determining means for outputting the first start position matching error information to the previous data, the second start position matching error information to the subsequent data, and Two pieces of information, one data error information and the second data error information, are added to the data, and the data separated and selected by the first selection means is divided into the second parameter, the data start information, Based on the continuity error information, the value of the number of remaining data counted by the remaining data number counting means, the end position consistency error information, and the scramble error information, the data is further separated and selected into a plurality of fields. Second selecting means for outputting additional information, the continuity error information, the end position consistency error information, and the scramble error information, A data selecting device for further selecting and outputting the data separated and selected by the second selecting means based on the fifth parameter and the additional information. . 14. The data selection device according to claim 13, wherein the second selection unit sets a specific field of the data separated and selected by the first selection unit to one regardless of the data identifier. If the data to be output collectively, and the data order information is not continuous, and the data start information indicates that the data is to be newly started, select the newly started data, If the previous data is not selected and the data that needs descrambling is not descrambled,
The data is not selected, and the end position consistency determination means outputs the end position consistency error information when the end position of the data does not match the end of the separated data. The second start position matching error information output by the start position consistency determination means is also output continuously until the next segmented data on which the data start information stands, and the data error determination The first data error information output by the means indicates that the data contains an error and is invalid.